PROCESS FOR ENHANCED PRE-REDUCTION OF CHROMITE

摘要

The present invention relates to a process for the partial oxidation of unagglomerated chromite ore and to the use of the claimed process in currently applied ferrochromium production processes. According to a first aspect thereof, the present invention provides a process for the partial oxidation of chromite. The said process includes the steps consisting of: (i) providing a source of unagglomerated chromite ore; (ii) subjecting the source of unagglomerated chromite ore to pre-oxidation at a temperature of 700" C to 1 100°C, both values inclusive; (iii) controlling the above-mentioned pre-oxidation temperature such that maximum migration of iron (Fe) to the surface of the chromite ore particles takes place and minimum Cr203 formation takes place; and (iv) forming a pre-oxidized source of unagglomerated chromite ore wherein maximum migration of iron (Fe) to the surface of the chromite ore particles takes place, as well as minimum Cr203 formation takes place. The present invention further provides for the use of the product prepared in accordance with the foregoing process.